Impact of renewable energy penetration rate on power system transient voltage stability

Transient voltage stability of power system with high penetration of renewable energy faces challenges. This paper proposes a method for quantitatively evaluating the impact of renewable energy penetration rate on transient voltage stability. Based on input-to-state stability (ISS) theory, security and stability indices are constructed to evaluate the stability characteristics, and a quantitative transient voltage stability assessment framework for power system with high penetration of renewable energy is established. Case studies are performed on MATLAB/Simulink, and security/stability indices under different renewable energy penetration rates are calculated. Finally, the critical scale of renewable energy integration is obtained through the coupling relationship between stability characteristics and renewable energy penetration rate.